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Re: Engine running cold
If the fan is not running AND you are not driving. It doesn't matter if the thermostat is stuck open or not. With no air flow through the radiator, it should heat up to normal and eventually past normal.
I'd try that idle test but maybe 5 minutes longer. With the heater OFF.
I'm suspecting the temperature sensor.
Are you sure you are not looking at Celcious numbers?
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65 Plymouth Belvedere
69 Dodge Super Bee
87 Dodge Ram
93 Ford Mustang 5L
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